I'm in a hurry but there's one thing I can tell immediately: with the right kind of hair, you need no care for that haircut at all. When I met my husband I thought he was spending half an hour every morning with a hairdryer and a cylindrical brush. He didn't even own any of those items. Park would need a dryer because her hair is thicker, that's all.
And if they're not too well off, her mother has learned hair cutting by doing it for her since she was small. It's not rocket science.

Contact lenses take time, especially since most of them you shouldn't wear more than ten to twelve hours in a row and the shifts in a US hospital are often longer than that. Plus, really thick glasses hide better improperly applied makeup (which is what you get without contacts if you're seriously shortsighted).